Before You Begin:
1. Safety First: Disconnect the negative (-) battery cable to prevent accidental sparking.
2. Pressure Relief: The fuel system is under pressure. You MUST relieve this pressure before disconnecting the fuel lines. There are a couple of ways to do this:
* Using the Schrader Valve: Some vehicles have a Schrader valve (similar to a tire valve) on the fuel rail. You can carefully depress it with a tire pressure gauge or special fuel pressure release tool to bleed off the pressure. Listen for the hissing sound to confirm pressure release.
* Cycling the Ignition: Another method is to cycle the ignition switch (ON, then OFF) several times. This will run the fuel pump until it reaches pressure, then cut off. Repeat this until you no longer hear the fuel pump running when you turn the key on. This is less reliable than using the Schrader valve if present.
3. Gather Supplies: You'll need a new fuel filter (ensure it's the correct one for your Silverado), wrenches (likely 13mm and possibly others), rags or shop towels, a container to catch spilled fuel, and possibly a fuel line disconnect tool (though sometimes you can carefully pry them apart).
Replacement Steps:
1. Locate the Fuel Filter: The fuel filter is typically located near the fuel tank, often under the vehicle. Consult your owner's manual for its exact location. It might be secured with straps or clips.
2. Prepare for Disconnect: Place your drain pan under the filter to collect any spilled fuel. Loosen the retaining straps or clips holding the filter in place.
3. Disconnect Fuel Lines: Carefully disconnect the fuel lines from the filter. These connections might be clamped or use a quick-connect fitting. If using quick-connects, be gentle to avoid damaging the seals. If using clamps, you'll need wrenches to loosen them. Use rags to absorb any fuel spillage.
4. Remove the Old Filter: Once the fuel lines are disconnected, remove the old filter. Take note of the orientation of the filter (which end goes where) – some filters have arrows indicating flow direction.
5. Install the New Filter: Install the new fuel filter, ensuring it's oriented correctly. Tighten the retaining straps or clips.
6. Reconnect Fuel Lines: Carefully reconnect the fuel lines to the new filter. Double-check that they are securely fastened.
7. Reconnect Battery: Reconnect the negative (-) battery cable.
8. Check for Leaks: Start the engine and check for any fuel leaks around the filter and connections. Let the engine run for a few minutes to ensure the new filter is primed and there are no leaks.
9. Inspect for Leaks (Again): After the engine has run for a few minutes, turn it off and visually inspect everything again for any leaks.
Important Considerations:
* Fuel is Flammable: Work in a well-ventilated area, away from any open flames or sparks.
* Fuel is Harmful: Avoid skin contact with fuel. Wash any spilled fuel immediately.
* Proper Disposal: Dispose of the old fuel filter and any spilled fuel properly according to local regulations.
* Professional Help: If you are uncomfortable performing this task, it's always best to take your vehicle to a qualified mechanic.
This is a general guide. Refer to a repair manual specific to your 2003 Chevy Silverado for detailed instructions and diagrams. Improperly installing the fuel filter can lead to engine damage. If you are not comfortable with this procedure, have a qualified mechanic perform the replacement.
